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<i class='fas fa-caret-right ms-1'></i></div><div id=sidebar-toc class="hidden md:block overflow-y-auto mx-6 md:mx-0 pe-6 pt-2 md:max-h-doc-sidebar bg-primary-bg md:bg-transparent"><div class="flex flex-wrap ms-4 -me-2 p-2 bg-secondary-bg md:bg-primary-bg rounded"><a class=hover:text-eureka href=https://b.hui.ke/docs/asiainfo-acse-training/>ACSE（亚信安全认证安全专家）</a></div><ul class=ps-6><li class=py-2><div><a class=hover:text-eureka href=https://b.hui.ke/docs/asiainfo-acse-training/9/>OSCE XG 第四讲 日志和管理</a></div></li><li class=py-2><div><a class=hover:text-eureka href=https://b.hui.ke/docs/asiainfo-acse-training/8/>OSCE XG 第三讲 病毒防护配置</a></div></li><li class=py-2><div><a class=hover:text-eureka href=https://b.hui.ke/docs/asiainfo-acse-training/7/>OSCE XG 第二讲 安装部署</a></div></li><li class=py-2><div><a class=hover:text-eureka href=https://b.hui.ke/docs/asiainfo-acse-training/6/>OSCE XG 第一讲 产品概述</a></div></li><li class=py-2><div><a class=hover:text-eureka href=https://b.hui.ke/docs/asiainfo-acse-training/5/>安全威胁课程——防护和治理</a></div></li><li class=py-2><div><a class=hover:text-eureka href=https://b.hui.ke/docs/asiainfo-acse-training/4/>安全威胁课程——网络攻击</a></div></li><li class=py-2><div><a class=hover:text-eureka href=https://b.hui.ke/docs/asiainfo-acse-training/3/>安全事件处理建议</a></div></li><li class=py-2><div><a class="text-eureka hover:text-eureka" href=https://b.hui.ke/docs/asiainfo-acse-training/2/>反病毒技术发展</a></div></li><li class=py-2><div><a class=hover:text-eureka href=https://b.hui.ke/docs/asiainfo-acse-training/1/>安全威胁课程-恶意软件部分</a></div></li></ul></div></div></div><div class="w-full md:w-3/4 lg:w-4/5 pb-8 pt-2 md:pt-8"><div class=flex><div class="w-full lg:w-3/4 px-6"><article class=prose><h1 class=mb-4>反病毒技术发展</h1><div class="text-tertiary-text not-prose mt-2 flex flex-row flex-wrap items-center"><div class="me-6 my-2"><i class="fas fa-calendar me-1"></i>
<span>2020-02-19</span></div><div class="me-6 my-2"><i class="fa-solid fa-pen-to-square me-1"></i>
<span>2020-02-19</span></div><div class="me-6 my-2"><i class="fas fa-clock me-1"></i>
<span>2 min read</span></div><div class="me-6 my-2"><i class="fas fa-folder me-1"></i>
<a href=https://b.hui.ke/categories/it/ class=hover:text-eureka>IT</a></div><div class="me-6 my-2"><i class="fas fa-th-list me-1"></i>
<a href=https://b.hui.ke/series/asiainfo/ class=hover:text-eureka>AsiaInfo</a></div><div class="me-6 my-2"><i class="fa-solid fa-eye me-1"></i>
<span id=busuanzi_value_page_pv><i class="fa fa-spinner fa-spin"></i></span> Hits</div></div><p>  技术部分第二节内容，即第二章《病毒与威胁基础》之任务 2《反病毒技术发展》</p><h2 id=早期病毒>早期病毒</h2><p>  文件感染方式</p><p>  功能单一</p><p>  防病毒应对：通过特征码匹配</p><h2 id=特征码>特征码</h2><p>  哈希散列</p><p>  一串二进制字符串</p><h2 id=扫描引擎>扫描引擎</h2><ol><li>自动化恶意软件初理机制</li><li>规定恶意软件入口点</li><li>匹配特征</li><li>挑战<ol><li>资源占用</li><li>对抗变种能力</li><li>对抗免杀能力</li><li>稳定性、兼容性</li></ol></li></ol><h2 id=恶意软件检测技术>恶意软件检测技术</h2><h3 id=特征码检测>特征码检测</h3><p>  基于文件某部分特征</p><p>  精确匹配技术</p><p>  早期，一张软盘对应一种病毒</p><p>  病毒库，从一周更新一次到每天更新</p><p>  拖慢系统运行速度</p><p>  无法及时识别新的恶意软件</p><h3 id=云查杀>云查杀</h3><ol><li>动态病毒库</li><li>实时、共享</li><li>查杀能力更为精确、有效</li><li>挑战<ol><li>隔离网络环境</li><li>加大自身体积</li><li>高速、自动化生成的变种</li></ol></li></ol><h3 id=启发式检测>启发式检测</h3><p>  启发式特征：通过一系列预定义的规则集来判断文件是否为恶意的检测方式</p><p>  相似度匹配</p><h3 id=特征码检测-vs-启发式检测>特征码检测 VS 启发式检测</h3><p>  启发式检测不能替代特征码检测</p><table><thead><tr><th style=text-align:center>优缺点</th><th style=text-align:center>特征码检测</th><th style=text-align:center>启发式检测</th></tr></thead><tbody><tr><td style=text-align:center>误报率</td><td style=text-align:center>低</td><td style=text-align:center>高</td></tr><tr><td style=text-align:center>未知病毒</td><td style=text-align:center>低</td><td style=text-align:center>高</td></tr><tr><td style=text-align:center>实现难度</td><td style=text-align:center>低</td><td style=text-align:center>高</td></tr></tbody></table><h2 id=恶意软件分析技术>恶意软件分析技术</h2><h3 id=静态扫描>静态扫描</h3><p>  检测静态文件是否存在恶意代码的过程</p><p>  静态扫描</p><ol><li>特征码检测</li><li>启发式检测：被动启发式检测</li><li>恶意软件对抗<ul><li>现象：一个硬盘中的文件在平时不会被检测为恶意软件，但是当他在内存中运行时就会被认为是恶意软件</li><li>技术：加壳、压缩</li></ul></li></ol><h3 id=动态扫描>动态扫描</h3><p>  动态分析是在恶意软件在运行过程中，抽取特征进行匹配</p><p>  状态特征</p><p>  行为特征</p><h3 id=沙盒技术>沙盒技术</h3><p>  可控的恶意软件运行环境，最小化恶意软件的感染范围</p><p>  分析出以下信息</p><ol><li>主机方面：系统修改、恶意软件在内存中的行为</li><li>网络方面：网络连接状态、数据包</li></ol><p>  完全模拟恶意软件运行的环境，分析出的行为更接近真实效果</p><h3 id=动态的安全防护态势感知>动态的安全防护（态势感知）</h3><p>  态势感知指在特定时空下，对动态环境中各元素或对象的察觉、理解以及对未来状态的预测</p><p>  依赖大数据的辅助和配合</p><p>  多方位联动分析</p><h3 id=人工智能>人工智能</h3><ul><li>目标：预判、处理、取证</li><li>常见应用：图像识别、人脸识别、语言翻译</li><li>应用于安全：机器学习、深度学习</li><li>反病毒技术：特征码检测 → 启发式检测</li><li>人工智能：模式识别 → 机器学习</li><li>机器学习：识别 → 理解 → 解释</li><li>已在使用中的机器学习<ol><li>C&C 网络流量通信行为</li><li>动态域名识别</li><li>鼠标动态行为检测</li><li>手机触屏行为学习</li><li>web 攻击行为学习</li></ol></li></ul></article><div class=my-4><a href=https://b.hui.ke/tags/%E5%8F%8D%E7%97%85%E6%AF%92%E6%8A%80%E6%9C%AF%E5%8F%91%E5%B1%95/ class="inline-block bg-tertiary-bg text-sm rounded px-3 py-1 my-1 me-2 hover:text-eureka">#反病毒技术发展</a>
<a href=https://b.hui.ke/tags/%E6%81%B6%E6%84%8F%E8%BD%AF%E4%BB%B6/ class="inline-block bg-tertiary-bg text-sm rounded px-3 py-1 my-1 me-2 hover:text-eureka">#恶意软件</a>
<a href=https://b.hui.ke/tags/%E7%97%85%E6%AF%92/ class="inline-block bg-tertiary-bg text-sm rounded px-3 py-1 my-1 me-2 hover:text-eureka">#病毒</a></div><div class=py-2><div class="my-8 flex flex-col items-center md:flex-row"><a href=https://b.hui.ke/authors/hui.ke/ class="md:me-4 text-primary-text h-24 w-24"><img src=https://b.hui.ke/bagua.webp class="bg-primary-bg w-full rounded-full" alt=Avatar></a><div class="mt-4 w-full md:mt-0 md:w-auto"><a href=https://b.hui.ke/authors/hui.ke/ class="mb-2 block border-b pb-1 text-lg font-bold"><h3>Hui.Ke</h3></a><span class="block pb-2">❤ Cyber Security | Safety is a priority.</span>
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<a href=https://b.hui.ke/docs/asiainfo-acse-training/1/ class=block>安全威胁课程-恶意软件部分</a></div></div><div id=valine-comments class=mt-4></div><script defer src=https://cdn.jsdelivr.net/npm/valine@1.4.16/dist/Valine.min.js integrity=sha384-e0+DNUCJo75aOAzHQbFWYBCM9/S4f0BhRJXvEgbE3mMS85RM20MSSGStHuNdY2QK crossorigin></script>
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hidden px-6 pb-6 lg:block"><nav id=TableOfContents><ul><li><a href=#早期病毒>早期病毒</a></li><li><a href=#特征码>特征码</a></li><li><a href=#扫描引擎>扫描引擎</a></li><li><a href=#恶意软件检测技术>恶意软件检测技术</a><ul><li><a href=#特征码检测>特征码检测</a></li><li><a href=#云查杀>云查杀</a></li><li><a href=#启发式检测>启发式检测</a></li><li><a href=#特征码检测-vs-启发式检测>特征码检测 VS 启发式检测</a></li></ul></li><li><a href=#恶意软件分析技术>恶意软件分析技术</a><ul><li><a href=#静态扫描>静态扫描</a></li><li><a href=#动态扫描>动态扫描</a></li><li><a href=#沙盒技术>沙盒技术</a></li><li><a href=#动态的安全防护态势感知>动态的安全防护（态势感知）</a></li><li><a href=#人工智能>人工智能</a></li></ul></li></ul></nav></div><script>window.addEventListener("DOMContentLoaded",()=>{enableStickyToc()})</script></div></div></div></div></div><script>document.addEventListener("DOMContentLoaded",()=>{hljs.highlightAll(),changeSidebarHeight(),switchDocToc()})</script></div></div></main><footer class=pl-scrollbar><div class="mx-auto w-full max-w-screen-xl"><div class="text-center p-6 pin-b"><script async src=/js/click.js></script><div id=poem_ip></div><script type=text/javascript>jinrishici.load(function(e){tags.innerHTML=e.data.matchTags})</script><div><span id=timeDate>载入年天数...</span><span id=times>载入时分秒...</span>
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